1228786253 has 2 divisors, whose sum is σ = 1228786254. Its totient is φ = 1228786252.

The previous prime is 1228786249. The next prime is 1228786319. The reversal of 1228786253 is 3526878221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805537924 + 423248329 = 28382^2 + 20573^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228786253 - 2² = 1228786249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1228786213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614393126 + 614393127.

It is an arithmetic number, because the mean of its divisors is an integer number (614393127).

Almost surely, 2^1228786253 is an apocalyptic number.

It is an amenable number.

1228786253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228786253 is an equidigital number, since it uses as much as digits as its factorization.

1228786253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 1228786253 is about 35054.0475979594. The cubic root of 1228786253 is about 1071.0887258914.

The spelling of 1228786253 in words is "one billion, two hundred twenty-eight million, seven hundred eighty-six thousand, two hundred fifty-three".